Hi,
I live in Florida and feed my rabbits greens. Yes rabbits love the leaves from banana stalks, as well as sugar cane leaves. Moringa is a wonderful thing to grow for feeding yourself and the rabbits and to keep them healthy. Rabbits in the tropics can get worms from being on the ground so that is something to watch out for.
I feed my rabbits weeds that grow around like dandelion and Spanish needle and thistles. They also love wild grape leaves, maple and butterfly bush. I have a lot of flowering ginger in my yard that grows wild and blue sky vine that grows verociously. I also planted comfrey and edible hibiscus for them. There is a forum on FB called Backyard Meat Rabbits that has many members that answers lots of questions.
Best wishes.
Becky